For me it happens only rarely and when the guns feel similar; i used to try and pump my semi-auto shottie when i first switched to it from my Sears Browning, and i caught myself lately trying to hit the slide release on my PPK.
"Don't bring a knife to a chainsaw fight."-Fear Night
"I have more important things to do than wear pants."-my lil' bro
Anything you can't do pantless, isn't worth doing.